Hi i have a question what is not working here. I don't know what is the problem.

(1 point) Find the unit tangent, normal and binormal vectors T, N, B, the curvaturex and center A of curvature of the curve x = -2t, y = -312, z = 2+3 att = 1. T = -sqrt19/19 i+ -3sqrt19/19 j+ 3sqrt19/sqrt19 k N = 0 i+ -(sqrt5/5) j+ 2sqrt5/5 k B = -(3sqrt95/95) i+ 2sqrt95/95 i+ sqrt95/95 k K= 3sqrt5/38 A=( -2 -83/15 106/15 Note that all of the answers are numbers